/Engine/Source/Runtime/CoreUObject/Public/UObject/UObjectBaseUtility.h
Returns the UE version of the linker for this object.
the UEversion of the engine's package file when this object was last saved, or GPackageFileUEVersion (current version) if this object does not have a linker, which indicates that a) this object is a native only class, or b) this object's linker has been detached, in which case it is already fully loaded
[FPackageFileVersion](API\Runtime\Core\UObject\FPackageFileVersion) GetLinkerUEVersion() const